feat(CommandInteractionResolvedData): access to "raw" resolved data

[monbrey]

In the absence of a good way to expose individual resolved data as "mentions", this exposed the complete, parsed interaction.data.resolved object as a number of Collections, similar to how MessageMentions are provided.

Aim is to do this in a non-breaking way for 13.1.0, hence using the "resolved" property name, leaving "mentions" available if we want to do a better filtering of it somewhere else down the track.

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating
• This PR changes the library's interface (methods or parameters added)